138880

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{31}}^1$

素因数の和:57

約数の個数: 64

約数和(自身を含む): 391680

約数和(自身を除く): 252800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 64, 70, 80, 112, 124, 128, 140, 155, 160, 217, 224, 248, 280, 310, 320, 434, 448, 496, 560, 620, 640, 868, 896, 992, 1085, 1120, 1240, 1736, 1984, 2170, 2240, 2480, 3472, 3968, 4340, 4480, 4960, 6944, 8680, 9920, 13888, 17360, 19840, 27776, 34720, 69440, 138880]

約数ペア:

[(1, 138880), (2, 69440), (4, 34720), (5, 27776), (7, 19840), (8, 17360), (10, 13888), (14, 9920), (16, 8680), (20, 6944), (28, 4960), (31, 4480), (32, 4340), (35, 3968), (40, 3472), (56, 2480), (62, 2240), (64, 2170), (70, 1984), (80, 1736), (112, 1240), (124, 1120), (128, 1085), (140, 992), (155, 896), (160, 868), (217, 640), (224, 620), (248, 560), (280, 496), (310, 448), (320, 434)]